How I can set the hole callout  (tap hole only) to show

I need to remove the 1st line

I need the depth to be 2d.p. only

Original version from attachment, I want the update to be the following

e.g

M3x0.5-6H, depth symbol 0.75

I want to make this automatically for all tap holes when I create them. I have thousands of holes to do. I don't want to do it one by one. Thanks